This episode helped to set up the endgame of the season, including a new mission for Jack in Apocalypse World and a scavenger hunt for Sam and Dean in the real world as they discover the four ingredients they need to open a portal.

The episode also helped to establish some internal conflict for the rest of season 13 and for once, it's not between Sam and Dean. Instead, it's between the Winchesters and Cas, who made a bold decision to essentially sacrifice one of their pals in order to save the world.

Still, this episode had some great lines thanks to Dean's love of bacon, the return of Bobby Singer and a healthy debate on whether Dean or Cas is prettier. I'll leave that for you to decide. Here are my favorite quotes from this episode of Supernatural.

"If bacon's what kills me, then I win."-Dean to Sam

"I wanted you to see the natural world before it was spoiled. Humans have good intentions, but they never truly appreciated the gift they were given. Left to their own devices, humans would destroy everything."-Zachariah posing as Cas to Jack